标签：技术 bsp 出现 vat date nal rod details base
For Java 1.4, 5, 6, 7, 8 pass this JVM argument to your application: -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:<file-path>
For Java 9, pass the JVM argument: -Xlog:gc*:file=<file-path>
file-path: is the location where GC log file will be written
代码：
public class testAllocation { private static final int _1MB=1024*1024; public static void main(String[] args) { byte[] allocation1; byte[] allocation2; byte[] allocation3; byte[] allocation4; allocation1=new byte[2*_1MB]; allocation2=new byte[2*_1MB]; allocation3=new byte[2*_1MB]; allocation4=new byte[4*_1MB]; //出现一次Minor GC } }
E:\javabase\out\production\javabase>java -XX:+PrintGCDetails -XX:+PrintGCDateSta mps -Xms20M -Xmx20M -Xmn10M testAllocation Heap PSYoungGen total 9216K, used 7644K [0x00000000ff600000, 0x0000000100000000 , 0x0000000100000000) eden space 8192K, 93% used [0x00000000ff600000,0x00000000ffd77070,0x00000000ff e00000) from space 1024K, 0% used [0x00000000fff00000,0x00000000fff00000,0x00000001000 00000) to space 1024K, 0% used [0x00000000ffe00000,0x00000000ffe00000,0x00000000fff 00000) ParOldGen total 10240K, used 4096K [0x00000000fec00000, 0x00000000ff60000 0, 0x00000000ff600000) object space 10240K, 40% used [0x00000000fec00000,0x00000000ff000010,0x0000000 0ff600000) Metaspace used 2521K, capacity 4486K, committed 4864K, reserved 1056768K class space used 271K, capacity 386K, committed 512K, reserved 1048576K
E:\javabase\out\production\javabase>java -XX:+PrintGCDetails -XX:+PrintGCDateSta mps -Xloggc:testAllocation-gc.log -Xms20M -Xmx20M -Xmn10M testAllocation
标签：技术 bsp 出现 vat date nal rod details base
原文地址：https://www.cnblogs.com/grey-wolf/p/10216014.html
